Date: Mon, 30 Nov 2015 23:57:29 +0100 From: Richard Weinberger <richard@....at> To: "Eric W. Biederman" <ebiederm@...ssion.com>, David Miller <davem@...emloft.net> Cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "kernel-hardening@...ts.openwall.com" <kernel-hardening@...ts.openwall.com>, bridge@...ts.linux-foundation.org, Stephen Hemminger <stephen@...workplumber.org>, Kees Cook <keescook@...omium.org> Subject: Re: [PATCH net] bridge: Only call /sbin/bridge-stp for the initial network namespace Am 30.11.2015 um 22:38 schrieb Eric W. Biederman: > > There is no defined mechanism to pass network namespace information > into /sbin/bridge-stp therefore don't even try to invoke it except > for bridge devices in the initial network namespace. > > It is possible for unprivileged users to cause /sbin/bridge-stp to be > invoked for any network device name which if /sbin/bridge-stp does not > guard against unreasonable arguments or being invoked twice on the same > network device could cause problems. > > Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com> Just figured that /sbin/bridge-stp is a shell script. Network interfaces can contain a lot of funny characters, maybe this is after all a security issue. Thanks, //richard
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